AtlasThe compoundCBG monograph

Compound monograph

Cannabigerol (CBG).

The mother cannabinoid earns its name in the flower, where three synthases take CBGa, the acid, and branch it into THC, CBD and CBC. CBGa decarboxylates to CBG, and both occur in the plant. The harder question is what CBG does in a body, and the answer we can grade rests mostly on receptor assays and animal work, with one small human trial of its effects on anxiety and stress. Every claim carries a grade and a hedge.

Browse the evidence →How we grade

Sources verified·21 studies·updated 9 August 2026·How we check

On this page10 sections

Reading depth

Origin

Everything begins with CBGA.

Trace THC, CBD or CBC back through the plant and each arrives at cannabigerolic acid (CBGa), the single precursor three synthases convert into those three lines. CBG itself, for all that ancestry, is non-intoxicating.

Figure E · biosynthesis

The making of the mother cannabinoid

Demonstrated · plant biochemistry

One mother acid, three branches: CBGA, the acid form of CBG, is where THCA, CBDA and CBCA begin. Each labelled step names the registry study behind it. The step that makes CBGA, from GPP and olivetolic acid, is drawn lighter: it is general biochemistry, and no primary study of that enzyme is in our registry yet. Sources: Taura 1996, Sirikantaramas 2004, Zirpel 2018, Wang 2016.

Ask the supplier: six questions about CBG.

Six questions to put to a supplier, each followed by the position the registry or this compound's page already holds, in its own words. The questions ask what the supplier states; none asks what anyone should take. Informational only, not medical or legal advice.

1How many milligrams of CBG per serving, and does the figure reconcile to the certificate?: Ask for the number and the working. The registry's acute human trial of CBG's effects used “a single 20 mg oral dose”; a trial dose is a scale to read a label against, not a dose to take.grade: LowCuttler 2024, PMID 39003387 · On the CBG page →
2On what basis does the label say non-intoxicating?: The registry documents it as receptor pharmacology: in vitro CBG acts as a CB1 antagonist, “and the compound itself is non-intoxicating”. A statement of identity, not an effect.study type: In vitroCascio 2010, PMID 20002104 · On the CBG page →
3Is the label's CBG figure the neutral compound, the acid, or the two added together?: Ask which. CBGA is the precursor that “Loses CO₂ (heat/time) → CBG”, so a certificate that folds the acid into the CBG line is counting a different molecule.On the CBG page →
4Does the label make an effect claim, and what grade does the supplier put on it?: The registry's human record on effects is small: “One small acute study earns Low confidence”, so any effect wording has to sit at that register or below.grade: LowCuttler 2024, PMID 39003387 · On the CBG page →
5Does the supplier carry the cardiovascular caution wherever effects are discussed?: The registry's α2 record is the source of it: “Because α2 agonism can lower blood pressure, this is the source of the platform's cardiovascular caution.” In vitro, and not a measured effect in people.study type: In vitroCascio 2010, PMID 20002104 · On the CBG page →
6What does the supplier say to a tested athlete?: Regulatory and testing status, not a health claim: “CBG is prohibited by the World Anti-Doping Agency — CBD is the only exempt cannabinoid.”Regulatory statusGillham et al., PMID 40920736 · On the CBG page →

Take the answers to the paperwork: Read a COA, then test the label wording. How the site grades what it holds is on How we grade.

Receptor pharmacology

How CBG behaves at its targets.

From the plant to the lab bench: in-vitro assays, run under controlled conditions, showing how the molecule behaves at each target. What happens in a person is a separate question, and these assays leave it open.

In lab studies, CBG touches several of the body's signalling systems: adrenaline and serotonin receptors, the cannabinoid CB1 receptor, and the channels that sense temperature. A busy molecule, on paper. What all that activity adds up to in people is still largely unknown. Switch to Researcher depth for receptor-level detail and binding values.

α2-adrenoceptor · agonistEC₅₀ ≈ 0.2 nMstudy type: In vitro

In vitro, CBG is a potent agonist at the α2-adrenoceptor. Because α2 agonism can lower blood pressure, this is the source of the platform's cardiovascular caution. Validated in vitro — receptor pharmacology, not a human clinical grade. Whether it changes blood pressure in people is uncharacterized (Hypothesized).

Cascio et al. (2010) · Br J PharmacolPMID 20002104

5-HT1A serotonin receptor · antagonistK_B ≈ 51.9 nMstudy type: In vitro

In vitro, CBG is a 5-HT1A antagonist, pulling the opposite way to CBD at the same receptor. Anyone reasoning about serotonergic effects should keep the two molecules apart. Validated in vitro — receptor pharmacology, not a human clinical grade.

Cascio et al. (2010) · Br J PharmacolPMID 20002104

CB1 cannabinoid receptor · antagoniststudy type: In vitro

In vitro, CBG acts as a CB1 antagonist, and the compound itself is non-intoxicating. Validated in vitro — receptor pharmacology, not a human clinical grade.

Cascio et al. (2010) · Br J PharmacolPMID 20002104

TRPV1 / TRPV2 channels · agonist–desensitiserstudy type: In vitro

In vitro, CBG first activates TRPV1/TRPV2 channels and then desensitises them, so the initial jolt gives way to a dulled response. Validated in vitro — receptor pharmacology, not a human clinical grade.

De Petrocellis et al. (2011) · Br J PharmacolPMID 21175579

TRPM8 channel · antagoniststudy type: In vitro

In vitro, CBG antagonises TRPM8, the channel that senses cold and menthol. Validated in vitro — receptor pharmacology, not a human clinical grade.

De Petrocellis et al. (2011) · Br J PharmacolPMID 21175579

Figure A · mechanism

CBG’s molecular-target map

These are laboratory (in-vitro) receptor findings — how CBG behaves at each target, not a proven effect in people. It is this genuinely distinctive multi-target profile (α₂ + 5-HT₁ₐ especially) that sets CBG apart from THC and CBD. Cascio 2010 · 10.1111/j.1476-5381.2009.00515.x · De Petrocellis 2011 · 10.1111/j.1476-5381.2010.01166.x

What the studies show

The human record on effects is small.

Step out of the dish and the evidence thins fast. Our registry holds one acute human trial of effects and one preclinical anti-inflammatory signal, each with its grade on its face.

Anxiety, stress & mood (human, acute) · acute signalgrade: Low

In the only human trial of CBG's effects on anxiety and stress (n=34, acute, crossover), a single 20 mg oral dose was associated with lower self-reported anxiety and stress, and volunteers showed no intoxication or impairment. One small acute study earns Low confidence and supports no treatment claim. More human CBG research is in print but ungraded here, and it goes beyond pharmacokinetics: a repeated-dose sleep trial among it found no benefit over placebo on its primary endpoint. The animal work pulls both ways: one study found anxiety unchanged and another saw it rise, which leaves any benefit unconfirmed.

Cuttler et al. (2024) · Scientific ReportsPMID 39003387

Intestinal inflammation · anti-inflammatory signalgrade: Low

In a murine (mouse) model of colitis, CBG reduced markers of intestinal inflammation. The finding is preclinical and says nothing yet about an effect in people.

Borrelli et al. (2013) · Biochem PharmacolPMID 23415610

Human record outside the registry.

Off-registry · carries no evidence grade

Four human CBG studies the platform cites outside the gated registry. Each is real, published and checkable, and none has been through the multi-gate publish, so none carries a rung: the chip is the same non-ladder chip the safety page gives them, and the finding never travels without its limit. The registry's graded human record on effects is the section above.

2026

Acute (single-dose) oral tolerability

Wolinsky et al., 2026 · J Pharmacol Exp Ther 2026:104984 · PMID 42575778 · NCT05324982

What was tested: A single-ascending-dose trial: twelve healthy adults took single oral doses of CBG isolate in MCT oil at 25, 50, 100 and 200 mg, with a placebo randomised into the dose sequence.

No drug-related adverse events were reported, and liver function tests did not exceed the upper limit of normal after either of the two highest doses. Blood levels rose in dose order but varied considerably between people. Subjective effects were minimal, with three exceptions: participants rated themselves significantly less “Jittery” and less “Active” at 50 mg, and significantly less “Calm” at 100 mg, the opposite of the effect CBG is popularly sold for. At 200 mg they reported more appetite. The authors' own conclusion: CBG was well tolerated with no robust pharmacodynamic effects, and chronic dosing studies are needed.

What it does not show: Twelve people, each dosed on single occasions, give a tolerability signal rather than a safety guarantee. Chronic human safety is not established: no published study has given CBG to people repeatedly over weeks or months and measured what happened. Disclosed interest: one co-author is affiliated with Charlotte's Web, a cannabinoid product company.

Off-registry · carries no evidence grade Verified against its PubMed record and cited in prose. The paper has yet to become a graded entry in the CBG Atlas registry, so it stays ungraded here. PubMed → On the safety page →

2024

Food effect on oral CBG

Story et al., 2024 · Cannabis Cannabinoid Res 9(6):1543-1555 · PMID 38574248

What was tested: A double-blind, double-crossover pilot trial: participants took a single 25 mg oral dose of CBG under different conditions, and concentrations were measured by tandem mass spectrometry.

A high-fat meal significantly raised total exposure, peak concentration and terminal half-life compared with a low-fat meal. The difference was wide enough that the threshold for bioequivalence between the two conditions was not met. Dietary fat affected exposure more than the emulsified delivery vehicle did.

What it does not show: Pharmacokinetics tracks where a compound goes and how long it stays, and leaves open what it does. No study in our registry links a CBG blood level to any outcome in a person. The published abstract omits the participant count, so the figure stays blank here; read it as a pilot study on that basis alone.

2025

CBG detection after repeated use of a CBD product

Gillham et al., 2025 · Med Sci Sports Exerc · PMID 40920736

What was tested: A randomised trial of a broad-spectrum CBD product containing only trace CBG, with urine collected across repeated daily use.

CBG was detectable in urine after repeated daily use, and concentrations appeared higher after exercise.

What it does not show: Regulatory and testing status, not a health claim: CBG is prohibited by the World Anti-Doping Agency, and CBD is the only exempt cannabinoid. The paper is in intake review and is not yet a graded entry in the CBG Atlas registry.

2023

Hemp-product intake and urinary cannabinoids

Mareck et al., 2023 · Drug Test Anal 15(1):27-41 · PMID 35633098

What was tested: A separate, ethics-approved human study gave commercial hemp products as single doses and analysed volunteers' urine afterwards. Its stated subject was the risk of unintentional anti-doping rule violations from consuming hemp products.

A product bought and used as a CBD product can carry minor cannabinoids, and CBD is the only one WADA exempts. Two independent groups with different designs reach the same practical warning.

What it does not show: Its published abstract itemises neither urine concentrations nor a volunteer count, so neither appears here. If a threshold matters to your eligibility, get it from your anti-doping organisation.

Safety

What to keep in mind.

Cardiovascular note

CBG is a potent α2-adrenoceptor agonist in vitro, and α2 agonism can lower blood pressure. Anyone taking blood-pressure or other cardiovascular medication should consult a clinician before use. This is educational information, not medical advice.

If you are a tested athlete

CBG is prohibited by the World Anti-Doping Agency — CBD is the only exempt cannabinoid. In a randomised trial of a broad-spectrum CBD product containing only trace CBG, CBG was detectable in urine after repeated daily use, and concentrations appeared higher after exercise. This is regulatory and testing status, not a health claim. Check the current WADA Prohibited List and your product's COA. (Gillham et al., PMID 40920736.)

Cited as an attributed regulatory and testing note. This paper is in intake review and is not yet a graded entry in the CBG Atlas registry, so it carries no evidence grade here.

The method

How we grade.

Six rungs, strongest at the top. Where a claim lands decides the verbs it is allowed, and the chip colors keep weak evidence looking weak.

Establishedgrade: Established

Settled science — replicated human data, or biochemistry that is not in dispute.

Demonstratedgrade: Demonstrated

Shown reproducibly in controlled experiments — typically laboratory (in-vitro) work.

Emerginggrade: Emerging

An early signal — preclinical (animal) work, or human evidence too limited to settle the question.

Lowgrade: Low

Limited and low-confidence — sparse, indirect, or single-source data.

Hypothesizedgrade: Hypothesized

Proposed and plausible — but not yet shown.

Not-supportedgrade: Not supported

Tested, and the evidence does NOT support it. This is a finding against the claim — not an absence of evidence.

Common questions

Common questions about CBG.

The 6 questions people ask first, answered short enough to quote, then the long tail of 59. Identity, chemistry and non-intoxication get straight answers with a grade attached. Effects get whatever grade our evidence registry gives them, and where the registry is empty, the answer is marked that way. Two groups have a page of their own: is CBG legal and will CBG show up on a drug test.

What this section covers · 43 of 59 graded

Of 59 questions answered, 43 carry a verified grade on the six-rung evidence ladder. 16 carry an evidence state in place of a rung, most often no primary evidence: our registry holds nothing on the question either way, a different claim from not supported and kept visibly apart from it.

Start here

Show the answers 6

Is CBG intoxicating?

No. CBG (cannabigerol) is non-intoxicating. In laboratory (in vitro) assays it behaves as an antagonist at the CB1 cannabinoid receptor, blocking it rather than switching it on (Cascio et al., 2010, PMID 20002104). That result is validated in vitro: receptor pharmacology from controlled lab assays, which carries no human clinical evidence grade and is not a measured clinical effect in people.

Why is CBG called the mother cannabinoid?

Because its acid form, cannabigerolic acid (CBGa), is the single precursor that three synthase enzymes convert into the THC, CBD and CBC lines. The name comes from that position in the plant's biosynthesis. It describes a family tree, and only a family tree.

Is CBG antibacterial?

So far, only in the lab and in mice. In laboratory (in vitro) tests and in a mouse infection model, CBG was active against methicillin-resistant Staphylococcus aureus (MRSA), acting on the bacterial membrane and on biofilms (Appendino et al., 2008, PMID 18681481; Farha et al., 2020, PMID 32017534). Both findings are preclinical. CBG has not been tested for this in humans, so the results are not evidence of benefit as an anti-infective. Evidence grade: Low.

grade: Low

Is there any human evidence for CBG?

Very little on effects. The one published human trial of CBG's effects on anxiety and stress was a double-blind, placebo-controlled crossover study that gave a single 20 mg oral dose to 34 healthy adults (Cuttler et al., 2024, PMID 39003387). Evidence grade: Low. One small acute study is a starting point, and it supports no treatment claim. More human CBG research is in print, and our registry leaves it ungraded. It goes beyond pharmacokinetics to studies that measured effects, among them a repeated-dose trial whose primary endpoint was null. A hand-kept list of those papers would go stale the moment the literature moved, so our safety page keeps the off-registry human record instead, with its disclosures.

grade: Low

Does CBG help with anxiety?

Not on current evidence. In the only human trial of CBG's effects on anxiety and stress, a one-time 20 mg oral dose was associated with lower self-reported anxiety and stress in healthy adults, who showed no intoxication or measurable impairment (Cuttler et al., 2024, PMID 39003387). The animal work tells a messier story. One study found no effect and another reported an anxiety-increasing effect, so the preclinical picture is mixed and leaves any benefit unconfirmed. Evidence grade: Low. Read the human result as an early signal; it does not show clinical efficacy.

grade: Low

Can CBG affect blood pressure?

This is the main safety caution on the platform. In vitro, CBG is a potent agonist at the α2-adrenoceptor (Cascio et al., 2010, PMID 20002104), and α2 agonism can lower blood pressure. Whether that produces a measurable change in people, and how large a change, is uncharacterized. Evidence grade: Hypothesized. Anyone taking blood-pressure or other cardiovascular medication should consult a clinician before use. This is educational information, not medical advice.

grade: Hypothesized

Identity & origin

Show the answers 4

What is CBG?

CBG (cannabigerol) is a non-intoxicating cannabinoid found naturally in hemp and cannabis. Its nickname, the "mother cannabinoid," really belongs to its acid form, CBGA, the raw material the plant turns into THC, CBD and CBC. The chemistry is well mapped. What CBG does in people is a question research has only just started asking.

Established

What does CBG (cannabigerol) mean?

CBG is short for cannabigerol, a phytocannabinoid with the formula C₂₁H₃₂O₂. "Cannabi-" names the plant it comes from, and "-gerol" points to the geranyl group in its structure. Chemically, CBG is cannabigerolic acid (CBGA) after decarboxylation, which puts it at the root of the plant's cannabinoid chemistry, the trunk the rest branch from.

Established

Where does CBG come from — why is it called the "mother cannabinoid"?

It starts as cannabigerolic acid (CBGA), the first cannabinoid the plant makes. Enzymes turn most of that CBGA into the acids behind THC, CBD and CBC, and heat converts whatever is left into CBG. Every one of those branches grows from the same molecule, and that shared root is where the "mother cannabinoid" name comes from.

Established

Is CBG natural or made in a lab?

CBG is natural. It occurs in hemp and cannabis, usually at low levels. Most of what reaches the market is extracted from CBG-rich hemp or made by gently heating CBGA, its natural acid form, and some producers have moved to fermentation. Whichever route it takes, the result is the plant's own molecule, and none of those routes makes it a synthetic or lab-designed cannabinoid.

Established

Psychoactivity

Show the answers 4

Does CBG get you high?

No. In laboratory studies CBG blocks the CB₁ receptor (Cascio 2010, PMID 20002104), the same receptor THC switches on to produce a high. The one human trial in our registry, Cuttler 2024, points the same way: it found neither intoxication nor impairment, which is why "non-intoxicating" is graded Established.

Established

Is CBG psychoactive?

CBG does not intoxicate. It produces no THC-style high or impairment because, in vitro, it blocks the CB₁ receptor instead of activating it (Cascio 2010, PMID 20002104). Stretch the word to cover anything that shifts mood and the picture blurs: one small human trial in our registry did report lower anxiety, a result graded Low. Non-intoxicating is Established; a mood effect is not.

Established

What does CBG feel like?

CBG has no established subjective effect profile. Some users describe a mild calm or focus without a high, and those accounts are anecdotes. The one trial in our registry that measured anxiety and stress found that a single 20 mg dose lowered both without intoxication, an early signal graded Low, not a defined "feel." (not medical advice)

Low

Is CBG energizing or calming?

Neither is established, and no evidence settles which is right. CBG is sold both as a daytime "focus" cannabinoid and as a calming one. Cuttler 2024, the human trial in our registry, found lower anxiety and stress after 20 mg, which leans loosely toward calming, but the study was small, acute and self-reported, and the finding is graded Low. (not medical advice)

Low

Legality

Show the answers 4

Is CBG legal?

In the US, largely yes: as of 2026, hemp-derived CBG is generally legal at the federal level under the 2018 Farm Bill if the product holds ≤0.3% delta-9 THC, with states adding rules of their own. Cross a border and the answer changes. The EU classifies CBG as an unauthorized novel food, and Canada regulates it as cannabis. General information, not legal advice; verify locally.

Established

Is CBG legal under the 2018 Farm Bill?

Generally yes, at the federal level. As of 2026, the 2018 Farm Bill covers hemp-derived CBG when the product contains ≤0.3% delta-9 THC by dry weight. Food is where it gets harder: the FDA has not authorized CBG as a dietary supplement or food, and state laws vary on top of that. Not legal advice; verify locally.

Established

Is CBG legal in all 50 states?

Not necessarily. Federal law allows hemp-derived CBG (≤0.3% delta-9 THC) under the 2018 Farm Bill, but each state writes its own rules, and some restrict hemp cannabinoids or particular product types. Where you live and what kind of product it is both matter, so check your state's current law. General information, not legal advice.

Established

Is CBG legal in the UK/EU/Canada?

It depends on the country. The EU classifies CBG as a novel food, so it needs authorization before it can be sold as a food or supplement. Canada regulates every phytocannabinoid, CBG included, under the Cannabis Act. In the UK, CBG sits outside drug control but inside the FSA novel-food regime. Not legal advice; verify locally.

Established

Effects & benefits

Show the answers 13

What are the benefits of CBG?

No benefit of CBG is established in humans. The marketing promises calm, focus, gut comfort and better skin. Early animal and laboratory studies report anti-inflammatory and antibacterial activity, preclinical signals graded Emerging, and in the one trial in our registry that measured anxiety and stress (Cuttler 2024), a 20 mg dose was linked to lower acute anxiety and stress. Promising, then, and still unproven. (not medical advice)

Emerging

What is CBG used for?

CBG goes mostly into wellness products marketed for everyday calm, focus, digestive comfort and skincare, and some people take it for exactly those reasons. Those uses come from consumers and marketers. The clinical record behind them in our registry is a single small trial on acute anxiety and stress, far too little to establish any medical use. (not medical advice)

Low

Does CBG help with anxiety, focus, or inflammation?

None of the three is established in humans, and each stands on different ground. The anxiety evidence is mixed: one small trial in our registry (Cuttler 2024) found lower acute anxiety and stress at 20 mg, while a mouse study (Zhou 2022) found no effect on fear memory, so the grade is Emerging at best. Inflammation data come only from animals (Borrelli 2013). Focus has barely been studied at all. The marketing is running well ahead of the science. (not medical advice)

Emerging

Is there human evidence for CBG?

Very little. As of 2026 our registry catalogues one controlled human trial of CBG's effects, Cuttler 2024, in which 34 adults took a single 20 mg oral dose and reported lower anxiety and stress, with neither intoxication nor impairment. Small, acute and self-reported, the finding is graded Low. The reviews say much the same about the field as a whole: human research on CBG is very limited. (not medical advice)

Low

Can CBG help with inflammation?

Only in preclinical work so far. In mice with chemically induced colitis, CBG eased the disease and lowered inflammatory markers (Borrelli 2013, PMID 23415610), and in a cell model of neuroinflammation it cut inflammatory cytokines (Gugliandolo 2018, PMID 29986533). The human column is empty: our registry holds no study of CBG for any inflammatory condition. A mouse-colitis result may suggest where research should go, and whether it does anything in a person is a question only a human trial can answer.

Low

Can CBG help with autoimmune conditions?

Nobody has tested it. We have catalogued no study of CBG in any autoimmune condition, whether in people or in animal or cell models of autoimmune disease. The nearest evidence comes from somewhere else entirely: chemically induced colitis in mice (Borrelli 2013, PMID 23415610) measures inflammation rather than autoimmunity, so it carries no weight for an autoimmune claim. The question is open, in both directions.

No primary evidence

Can CBG lower eye pressure or help with glaucoma?

Unknown: there is no primary evidence either way on CBG and intraocular pressure. The search turns up no human trial and no animal or cell study. The idea comes from older research on cannabinoids as a group, and those findings cannot be carried over to CBG. Nothing here should take the place of prescribed glaucoma treatment (not medical advice).

No primary evidence

Can CBG protect nerve cells or help with Huntington's disease?

Only in animals so far. In mouse models of Huntington's disease, CBG lowered markers of neuroinflammation and helped preserve neurons (Valdeolivas 2015, PMID 25252936), a preclinical finding. People are a different matter: our registry has no human study of CBG in Huntington's or any other neurodegenerative condition. A mouse result may suggest where research should go; it does not show a benefit in a person. CBG is not a treatment for any neurological disease.

Low

Does CBG kill bacteria, and does it work against MRSA?

In the lab, yes. CBG was active in vitro against Gram-positive bacteria, MRSA among them (Appendino 2008, PMID 18681481), and later work reported activity in a mouse infection model (Farha 2020, PMID 32017534). There the trail stops. CBG has never been given to a person as an antibiotic, so clinical trials, dosing studies and comparisons with existing antibiotics are all missing. Activity in a dish is a long way from a medicine, and CBG must not replace antibiotic treatment (not medical advice).

Low

Can CBG treat cancer?

No. CBG is not a cancer treatment, and no human study supports using it as one. What exists is preclinical and narrow: CBG slowed the growth of colorectal cancer cells, and of tumours in mice (Borrelli 2014, PMID 25269802), in a single cancer type. It has never been tested in a person for any cancer, and nobody should delay or replace oncology care because of it (not medical advice).

Low

Does CBG increase appetite?

In rats it did. In a rodent feeding study, CBG raised food intake without the sedative or behavioural effects seen with THC (Brierley 2016, PMID 27503475). The human record is blank: our registry has no trial of CBG for appetite or cachexia, whether in cancer-related weight loss or in healthy volunteers. A rodent result may point in a direction, and only a human trial could show whether CBG changes appetite in a person.

Low

Can CBG help with depression?

The question is untested. Our registry holds no study of CBG and depression, neither a human trial nor an animal or cell model of depressive behaviour. The nearest data come from a single-dose study of self-reported anxiety and stress, a different outcome that can't stand in for depression research. CBG is not a treatment for depression, and nobody should change prescribed treatment because of it (not medical advice).

No primary evidence

Does CBG boost GABA?

No primary evidence we can find supports it. The claim that CBG inhibits GABA uptake circulates widely, and it travels without any citation that backs it in the form stated. We hold no study of CBG and GABA in a person, and a mechanism earns a place in the registry only once it traces to a source. GABA sits outside CBG's verified receptor pharmacology.

No primary evidence

Safety & side effects

Show the answers 4

Is CBG safe?

CBG's safety has not been fully established, and the evidence on it is graded Low. The controlled human data in our registry come from one acute trial (20 mg, no impairment). Long-term use, repeated or higher doses and drug interactions have had little study. Because CBG acts on α₂-adrenoceptors that help regulate blood pressure (Cascio 2010), consult a clinician if you take cardiovascular medication. (not medical advice)

Low

What are CBG's side effects?

Little is known, because CBG's side effects have not been well characterized. In Cuttler 2024, the human trial in our registry, 20 mg caused neither intoxication nor impairment. Users anecdotally describe dry mouth, drowsiness or mild digestive upset, the complaints familiar from other cannabinoids, and for CBG every one of them remains unconfirmed. Its α₂ activity may affect blood pressure — caution with cardiovascular medication. (not medical advice)

Low

Can you take too much CBG?

Nobody knows where "too much" begins, because CBG has neither an established dose nor a toxicity threshold. The registry trial that measured anxiety and stress used a single 20 mg dose, and higher amounts, repeated use and overdose risk remain unstudied. Because CBG acts on α₂-adrenoceptors linked to blood pressure, over-use is a particular caution on cardiovascular medication. (not medical advice)

Low

Does CBG interact with medications or blood-pressure meds?

Possibly, though CBG-specific data are thin. Lab studies show CBG acts on α₂-adrenoceptors (Cascio 2010), part of the system that regulates blood pressure, so anyone on cardiovascular medication should be cautious and consult a clinician. Cannabinoids in general can affect drug-metabolizing enzymes; for CBG specifically, interaction data are not established. Ask a pharmacist. (not medical advice)

Low

Drug testing

Show the answers 3

Will CBG show up on a drug test?

Generally not, because standard drug tests look for THC and its metabolite rather than CBG. The risk sits in the product. Full-spectrum CBG can carry trace THC (up to 0.3%), and that THC can build up with regular use. Data on whether CBG cross-reacts with test assays are limited, so caution is sensible.

Low

Does CBG contain THC?

No. CBG (cannabigerol) is a separate, non-intoxicating molecule, C₂₁H₃₂O₂. The product around it is another story: full-spectrum hemp products carry trace THC (≤0.3%), while broad-spectrum and isolate products are formulated to remove it. The certificate of analysis tells you which one you have.

Established

Can CBG make you fail a drug test?

Not on its own, since standard tests detect THC rather than CBG. Full-spectrum CBG products, though, carry trace THC that can accumulate with regular use and produce a positive result; isolate and broad-spectrum products carry less of that risk. Cross-reactivity data specific to CBG are limited, graded Low, and no product can be guaranteed test-safe.

Low

Usage & dosing

Show the answers 4

How do you take CBG (oil, capsule, etc.)?

In several formats. Oils and tinctures are held under the tongue and then swallowed. Capsules, softgels, gummies and beverages are swallowed outright, topicals go on the skin, and vaporized flower or concentrate is inhaled. The route changes how fast it takes effect. What none of them comes with is an established CBG dose. (not medical advice)

Established

What CBG products are there?

CBG is sold as oils and tinctures, capsules and softgels, gummies and edibles, beverages, topicals and balms, vapes, and hemp flower. Many products blend it with a second cannabinoid, most often CBD, and they come as full-spectrum, broad-spectrum or isolate. A third-party certificate of analysis is how you confirm what is actually in the bottle.

Established

How much CBG should I take?

There is no established dose to give. The trial in our registry gave a single 20 mg oral dose; that is the amount studied, and a study dose is a data point rather than a recommendation. No official dosing guidelines exist, and safe amounts for repeated or long-term use have not been defined. Consult a clinician, especially if you take cardiovascular medication. (not medical advice)

No primary evidence

How long does CBG take to work or last?

The timings are unknown, because CBG's onset and duration remain uncharacterized. Reviews point to how little pharmacokinetic research exists, and we publish only timings we can verify. For cannabinoids generally, inhaled and under-the-tongue routes tend to act sooner, while swallowed forms act more slowly but may last longer. CBG-specific timing is not established. (not medical advice)

No primary evidence

Comparisons

Show the answers 4

CBG vs CBD — what's the difference?

They are two non-intoxicating molecules that hit different targets. In lab studies CBG acts on α₂-adrenoceptors and blocks 5-HT₁ₐ serotonin receptors (Cascio 2010), whereas CBD activates 5-HT₁ₐ, pushing the same receptor the opposite way. The research gap is just as wide: CBD has far more studies behind it and an approved prescription epilepsy medicine, while CBG's human evidence in our registry is one small trial.

Validated in vitro

CBG vs THC — what's the difference?

THC intoxicates and CBG doesn't. THC is a partial agonist at the CB₁ receptor, which is what produces the high and the impairment; in lab studies CBG does the reverse, acting as a CB₁ antagonist, and the human trial in our registry recorded no intoxication. The two also part ways on chemistry and legal status.

Established

CBG vs CBN — what's the difference?

They form by different routes, at opposite ends of the plant's chemistry. CBG is the neutral form of CBGA, the plant's biosynthetic starting point, and it is non-intoxicating. CBN is what THC breaks down into through oxidation, so it accumulates as cannabis ages. CBN is heavily marketed for sleep, a use controlled human studies have not established, and CBG is not a sleep product.

Established

CBG or CBD — which is better for inflammation or focus?

The evidence can't rank them yet. No head-to-head human trial has compared CBG and CBD for inflammation, focus or any other outcome. On inflammation both have only preclinical signals, and on focus neither has meaningful data, so the comparison stays "catalogue in progress." (not medical advice)

Catalogue in progress

Chemistry & production

Show the answers 4

What is CBG's formula (C₂₁H₃₂O₂)?

The molecular formula is C₂₁H₃₂O₂ (CAS 25654-31-3), for a molecular weight of about 316.5 g/mol. A resorcinol core carries two chains, a geranyl group and a five-carbon (pentyl) side chain. Strip the acid group from cannabigerolic acid (CBGA, C₂₂H₃₂O₄) by decarboxylation, and CBG is what remains.

Established

How is CBG extracted (why is the yield so low)?

Producers usually extract CBG from hemp with CO₂ or ethanol, then purify it. The low yield starts in the field: the living plant converts most of its cannabigerolic acid (CBGA) into the acids behind THC, CBD and CBC, leaving little CBG. Growers who want more plant CBG-rich chemotypes or harvest early.

Established

Is CBG a precursor to THC and CBD?

Indirectly, through its acid form. The plant makes cannabigerolic acid (CBGA), and enzymes convert it into THCA, CBDA and CBCA, which shed CO₂ when heated and become THC, CBD and CBC. CBG is the neutral form of that same parent acid, hence the "mother cannabinoid" label.

Established

What is CBGA, and does CBG come from an acid?

Yes. CBG comes from cannabigerolic acid (CBGA, C₂₂H₃₂O₄), the form the raw plant actually carries. Heat CBGA to roughly 110–130 °C (decarboxylation) and a carboxyl group leaves as CO₂, with neutral CBG left behind. CBGA is also the branch point for THCA, CBDA and CBCA.

Established

Buying & trust

Show the answers 5

Where can I buy CBG?

Wherever hemp-derived products are legal, CBG is sold online and in some hemp, CBD and wellness shops as oils, capsules, gummies and topicals. What you can buy depends on your jurisdiction and the product class. Wherever you shop, pick brands that publish a batch-specific third-party certificate of analysis (COA). Not legal advice.

Established

Why is CBG more expensive than CBD?

Because the plant makes so little of it. In most hemp, cannabigerolic acid (CBGA) is converted into other cannabinoids as the plant matures, so very little CBG is left by harvest. Getting useful quantities means CBG-rich chemotypes, early harvests, or more biomass and processing, and every one of those costs more than producing abundant CBD.

Established

How do I know a CBG product is real (COA)?

Ask for a third-party certificate of analysis (COA), ideally recent and specific to the batch. A good one shows CBG content that matches the label, THC within legal limits, and screening for pesticides, solvents, heavy metals and microbes. A seller who can't produce one has given you reason to doubt everything else on the label.

Established

Is CBG worth it?

That depends on what you want from it, and the science is early. The strongest thing in CBG's favour is one small human trial in our registry on acute anxiety and stress, graded Low; every other claimed benefit rests on preclinical work and remains unproven. If you try it, buy COA-verified products and mind the blood-pressure caution if you take cardiovascular medication. (not medical advice)

Low

What should I look for when buying CBG?

Start with a recent, batch-specific third-party COA that confirms CBG content and screens for pesticides, solvents, heavy metals and microbials. Then check the spectrum: full-spectrum products carry trace THC, while broad-spectrum and isolate are formulated without it. The label should match the COA. Favor transparent brands, and note the α₂ blood-pressure caution if on cardiovascular medication.

Established

Before you act on what you read about CBG

Informational only, not medical advice. CBG Atlas is a scientific reference. Nothing here diagnoses, treats, cures or prevents any disease. Every claim on the page carries the grade of the evidence behind it, and the grade sets the words the claim may use. How we grade evidence.

Cardiovascular note. CBG is a potent α2-adrenoceptor agonist in vitro, and α2 agonism can lower blood pressure. Anyone taking blood-pressure or other cardiovascular medication should consult a clinician before use. This is educational information, not medical advice.

Funding and independence. Peregrine Biopharma funds the platform and holds no editorial authority.

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Compound monographs

The rest of the family.

Seven compounds, each with its own monograph. The line under each one is what the verified registry actually holds for it — including where that is nothing yet.

Keep exploring

Families

Minor cannabinoids

Its acid or neutral form

CBGA — cannabigerolic acid

Its varin or pentyl analogue

CBGV — cannabigerovarin

Head-to-head

Reference

Background reading

Everything begins with CBGA.

Ask the supplier: six questions about CBG.

How CBG behaves at its targets.

The human record on effects is small.

Human record outside the registry.

Acute (single-dose) oral tolerability

Food effect on oral CBG

CBG detection after repeated use of a CBD product

Hemp-product intake and urinary cannabinoids

What to keep in mind.

How we grade.

Common questions about CBG.

Start here

Is CBG intoxicating?

Why is CBG called the mother cannabinoid?

Is CBG antibacterial?

Is there any human evidence for CBG?

Does CBG help with anxiety?

Can CBG affect blood pressure?

Identity & origin

What is CBG?

What does CBG (cannabigerol) mean?

Where does CBG come from — why is it called the "mother cannabinoid"?

Is CBG natural or made in a lab?

Psychoactivity

Does CBG get you high?

Is CBG psychoactive?

What does CBG feel like?

Is CBG energizing or calming?

Legality

Is CBG legal?

Is CBG legal under the 2018 Farm Bill?

Is CBG legal in all 50 states?

Is CBG legal in the UK/EU/Canada?

Effects & benefits

What are the benefits of CBG?

What is CBG used for?

Does CBG help with anxiety, focus, or inflammation?

Is there human evidence for CBG?

Can CBG help with inflammation?

Can CBG help with autoimmune conditions?

Can CBG lower eye pressure or help with glaucoma?

Can CBG protect nerve cells or help with Huntington's disease?

Does CBG kill bacteria, and does it work against MRSA?

Can CBG treat cancer?

Does CBG increase appetite?

Can CBG help with depression?

Does CBG boost GABA?

Safety & side effects

Is CBG safe?

What are CBG's side effects?

Can you take too much CBG?

Does CBG interact with medications or blood-pressure meds?

Drug testing

Will CBG show up on a drug test?

Does CBG contain THC?

Can CBG make you fail a drug test?

Usage & dosing

How do you take CBG (oil, capsule, etc.)?

What CBG products are there?

How much CBG should I take?

How long does CBG take to work or last?

Comparisons

CBG vs CBD — what's the difference?

CBG vs THC — what's the difference?

CBG vs CBN — what's the difference?

CBG or CBD — which is better for inflammation or focus?

Chemistry & production

What is CBG's formula (C₂₁H₃₂O₂)?

How is CBG extracted (why is the yield so low)?

Is CBG a precursor to THC and CBD?

What is CBGA, and does CBG come from an acid?

Buying & trust

Where can I buy CBG?

Why is CBG more expensive than CBD?

How do I know a CBG product is real (COA)?

Is CBG worth it?

What should I look for when buying CBG?

More questions people ask

Can you take CBG and CBD together?